6610665636 has 45 divisors (see below), whose sum is σ = 17285412529. Its totient is φ = 2203067376.

The previous prime is 6610665631. The next prime is 6610665641. The reversal of 6610665636 is 6365660166.

The square root of 6610665636 is 81306.

It is a perfect power (a square), and thus also a powerful number.

6610665636 is a `hidden beast` number, since 6 + 6 + 1 + 0 + 6 + 6 + 5 + 636 = 666.

It is an interprime number because it is at equal distance from previous prime (6610665631) and next prime (6610665641).

It can be written as a sum of positive squares in only one way, i.e., 26316900 + 6584348736 = 5130^2 + 81144^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6610665591 and 6610665600.

It is not an unprimeable number, because it can be changed into a prime (6610665631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1461250 + ... + 1465766.

Almost surely, 2^6610665636 is an apocalyptic number.

6610665636 is the 81306-th square number.

It is an amenable number.

6610665636 is an abundant number, since it is smaller than the sum of its proper divisors (10674746893).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6610665636 is an frugal number, since it uses more digits than its factorization.

6610665636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9050 (or 4522 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

The cubic root of 6610665636 is about 1876.7873337722.

The spelling of 6610665636 in words is "six billion, six hundred ten million, six hundred sixty-five thousand, six hundred thirty-six".